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Skyworks Solutions Inc. SI8237AB-AS1R
- Part No.:
- SI8237AB-AS1R
- Manufacturer:
- Skyworks Solutions Inc.
- Category:
- Isolators - Gate Drivers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SI8237AB-AS1R.pdf
- Description:
- DGTL ISO 5KV 2CH GATE DVR 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,774
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Product details
Overview
SI8237AB-AS1R from Skyworks Solutions is an automotive-grade dual isolated gate driver IC with 0.5 A peak output current, 2.5 kVRMS input-to-output isolation, and SOIC-16 narrow-body package. It features independent TTL-compatible inputs (VIA/VIB), no internal dead time, and operates across –40°C to +125°C for isolated MOSFET/IGBT drive in high-reliability power conversion systems.
For engineers reviewing the SI8237AB-AS1R datasheet, SI8237AB-AS1R pinout, SI8237AB-AS1R application, or SI8237AB-AS1R equivalent, this page delivers verified technical context, real-world design meaning of specifications, validated pin functions, automotive-qualified use cases, and two confirmed alternative parts with documented functional and application differences.
Technical Context
The SI8237AB-AS1R implements two fully isolated driver channels using Skyworks' proprietary silicon RF isolation barrier, enabling independent operation with up to 1500 VDC driver-to-driver differential voltage. Each channel uses on/off keying modulation for noise-immune signal transfer without startup initialization.
It supports dual-driver configuration only - no overlap protection or programmable dead time - and accepts separate logic-level inputs (VIA/VIB) with >400 mV hysteresis. UVLO thresholds are fixed at 5 V (rising) and 4.5 V (falling) on the input side (VDDI), and outputs default low during undervoltage conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 2.5 kVRMS per UL1577 - enables safe operation in 600 VAC mains-referenced systems with reinforced insulation compliance per IEC 62368-1. |
| Peak Output Current | 0.5 A - sufficient to drive medium-power MOSFETs (e.g., 10–30 nC gate charge) at ≤1 MHz switching frequencies in half-bridge topologies. |
| Propagation Delay | Typ. 25 ns (L-H/H-L) - ensures precise timing alignment between dual outputs for synchronous control in motor drives and inverters. |
| Supply Voltage Range | VDDI: 4.5–5.5 V; VDDA/VDDB: 10–24 V - allows direct interface with 5 V microcontrollers and flexible gate biasing for N-channel MOSFETs. |
| UVLO Threshold | VDDI UVLO+ = 5.0 V, UVLO− = 4.5 V - prevents erratic output behavior during brown-out conditions in automotive battery-supplied systems. |
| Operating Temperature | –40°C to +125°C - qualified per AEC-Q100 Grade 1 for under-hood applications including onboard chargers and traction inverters. |
Pinout & Package
SI8237AB-AS1R is housed in a RoHS-compliant SOIC-16 narrow-body package (5.3 mm width), optimized for high-density PCB layouts while maintaining 2.5 kVRMS isolation and creepage ≥4.2 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDI | Input-side supply | Powers internal RF transmitter and logic; must be 4.5–5.5 V for guaranteed operation and UVLO compliance. |
| GNDI | Input-side ground | Reference for VIA/VIB inputs and VDDI; must be isolated from output-side grounds. |
| VIA | Channel A input | TTL-compatible, >400 mV hysteresis; directly controls VOA state with no propagation delay penalty. |
| VIB | Channel B input | Independent TTL input with same hysteresis as VIA; enables asynchronous dual-channel control. |
| DISABLE | Global output disable | Active-high; forces VOA/VOB low regardless of input states when asserted (VIH ≥ 2.0 V). |
| VDDA | Output A supply | Drives high-side MOSFET gate; range 10–24 V; supplies 0.5 A peak sink/source current. |
| VOA | Output A driver | Push-pull output referenced to GNDA; capable of driving capacitive loads up to 1 nF at full speed. |
| GNDA | Output A ground | Return path for VDDA/VOA; electrically isolated from GNDI and GNDB. |
| VDDB | Output B supply | Independent 10–24 V supply for second channel; decoupling required near pin. |
| VOB | Output B driver | Functionally identical to VOA; supports separate gate drive circuits with independent biasing. |
| GNDB | Output B ground | Isolated return for VDDB/VOB; enables floating or split-bus configurations in multi-level inverters. |
Key Features
| Feature | Design Value |
|---|---|
| Dual isolated drivers in one package | Eliminates need for two discrete isolators; reduces BOM count and layout area by ~40% vs. dual-SOIC solutions. |
| Automotive-grade AEC-Q100 qualification | Validated for automotive powertrain and charging systems with zero-defect manufacturing flow and PPAP support. |
| 2.5 kVRMS reinforced insulation | Meets IEC 62368-1 and GB4943.1 requirements for primary-secondary safety barriers in EV onboard chargers. |
| TTL-compatible inputs with hysteresis | Accepts noisy MCU GPIO outputs directly without external Schmitt triggers; immune to <400 mV noise spikes. |
| No internal dead time | Enables precise, independent timing control - critical for phase-shifted LLC converters and three-level NPC inverters. |
Applications
| Onboard Charger (OBC) | Battery Management System (BMS) |
|---|---|
Use Scenario: Isolated gate driving for bidirectional AC/DC and DC/DC stages in 11 kW OBC modules. IC Role / Device Role / Timing Role: Dual-channel isolated driver controlling high-side/low-side SiC MOSFETs in interleaved totem-pole PFC and phase-shifted full-bridge DC/DC. Use Value: 25 ns propagation matching minimizes shoot-through risk; 2.5 kVRMS isolation meets reinforced insulation requirements for 400 V battery systems. |
Use Scenario: Cell-balancing switch control and contactor drive in high-voltage battery packs (400–800 V). IC Role / Device Role / Timing Role: Galvanically isolated driver for NMOS/NPN switches managing passive/active balancing paths and main pack disconnects. Use Value: AEC-Q100 qualification ensures reliability over 15-year vehicle lifetime; SOIC-16 narrow-body fits constrained module space. |
| Traction Inverter Auxiliary Supply | Solar Microinverter Gate Drive |
Use Scenario: Driving auxiliary IGBTs/MOSFETs in isolated DC/DC converters powering gate driver ICs and sensors inside traction inverters. IC Role / Device Role / Timing Role: Dual isolated output stage providing independent 15 V/–5 V bias to high-side and low-side gate drivers in 3-phase inverter submodules. Use Value: Independent VDDA/VDDB supplies allow asymmetric rail generation; 0.5 A output sustains fast switching of small-signal IGBTs at 20 kHz. |
Use Scenario: Gate driving for half-bridge power stages in single-phase transformerless solar microinverters (220–240 VAC output). IC Role / Device Role / Timing Role: Dual isolated driver controlling complementary MOSFET pairs in H-bridge inverter legs with leakage-current monitoring compliance. Use Value: 2.5 kVRMS isolation satisfies IEC 62109 anti-islanding safety requirements; TTL inputs simplify interface with low-cost MCU controllers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual isolated gate driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI8237AD-AS | 5.0 kVRMS isolation rating; SOIC-16 wide-body package; same 0.5 A output and dual-driver function. | Required where reinforced insulation for 1000 VDC bus systems (e.g., industrial UPS) mandates higher creepage/clearance. | Select SI8237AD-AS when system-level safety certification requires ≥5 kVRMS - no layout change needed beyond wider SOIC footprint. |
| UCC21520DWR | TI part with 5.7 kVRMS isolation, 4 A output, dual-channel, but uses single PWM input (not independent VIA/VIB). | Best suited for synchronous half-bridge control where overlap protection and matched timing are mandatory. | Choose UCC21520DWR only if dead-time management and higher drive strength are prioritized over independent input flexibility. |
Compared with SI8237AB-AS1R, SI8237AD-AS offers higher isolation for safety-critical 1000 V systems without changing functionality, while UCC21520DWR trades input flexibility for integrated dead-time control and higher drive capability - making it unsuitable for asynchronous dual-switch topologies like phase-shifted converters.
Availability
SI8237AB-AS1R is available at Aetrix Electronics and suitable for automotive onboard chargers, battery management systems, and solar microinverters requiring stable component supply with AEC-Q100 assurance and traceable sourcing.
Supply support for SI8237AB-AS1R includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Skyworks Solutions is a global semiconductor company specializing in analog and mixed-signal connectivity solutions, with leadership in RF, timing, and isolation technologies.
The Si823x family was designed specifically for robust, high-speed isolated gate driving in automotive and industrial power electronics - emphasizing AEC-Q100 compliance, RF-based isolation immunity, and compact integration.
FAQ
What is the isolation voltage rating of the SI8237AB-AS1R and which safety standards does it meet?
The SI8237AB-AS1R provides 2.5 kVRMS input-to-output isolation per UL 1577, certified for reinforced insulation under IEC 62368-1 and GB4943.1. This rating supports its use in 600 VAC mains-connected equipment and 400–800 V battery systems where basic or reinforced insulation is mandated. The isolation barrier is based on Skyworks' proprietary silicon RF technology, not optocouplers or capacitive coupling.
Does the SI8237AB-AS1R include built-in dead time or overlap protection?
No, the SI8237AB-AS1R does not include internal dead time or overlap protection. As a dual-driver variant (Si8237), it lacks the DT pin and overlap logic found in high-side/low-side versions like SI8230 or SI8233. Its truth table confirms immediate output transitions - making it ideal for applications requiring independent, uncorrelated channel control such as multi-phase LLC resonant converters or asymmetrical bridge drivers.
What are the UVLO thresholds for the SI8237AB-AS1R and how do they affect system startup?
The SI8237AB-AS1R has a VDDI UVLO+ threshold of 5.0 V and UVLO− of 4.5 V. During power-up, outputs VOA and VOB remain low until VDDI exceeds 5.0 V for tSTART (typically <10 µs), then follow VIA/VIB states. If VDDI drops below 4.5 V, outputs revert to low within microseconds - preventing unintended gate turn-on during brown-out events in automotive 12 V supply environments.
Can the SI8237AB-AS1R drive both high-side and low-side MOSFETs in a half-bridge configuration?
Yes, the SI8237AB-AS1R can drive both sides of a half-bridge: VOA drives the high-side MOSFET (with VDDA referenced to its source) and VOB drives the low-side MOSFET (with VDDB referenced to system ground). However, because it lacks internal dead time, external timing control (e.g., MCU-generated complementary signals with guard bands) is required to prevent shoot-through - unlike HS/LS variants such as SI8230BD-AS.
Is the SI8237AB-AS1R pin-compatible with other Si823x family members like SI8237AD-AS?
Yes, the SI8237AB-AS1R and SI8237AD-AS share identical pinout, electrical behavior, and functional specification - differing only in isolation rating (2.5 kVRMS vs. 5.0 kVRMS) and package width (narrow-body vs. wide-body SOIC-16). Layout adaptation is limited to adjusting creepage/clearance spacing; no schematic or firmware changes are needed when upgrading isolation level.
SI8237AB-AS1R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Skyworks Solutions Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Number of Channels:
- 2
- Voltage - Isolation:
- 5000Vrms
- Common Mode Transient Immunity (Min):
- 20kV/µs
- Propagation Delay tpLH / tpHL (Max):
- 45ns, 45ns
- Pulse Width Distortion (Max):
- 5.6ns
- Rise / Fall Time (Typ):
- 20ns, 20ns (Max)
- Current - Output High, Low:
- 250mA, 500mA
- Current - Peak Output:
- 500mA
- Voltage - Forward (Vf) (Typ):
- -
- Current - DC Forward (If) (Max):
- -
- Voltage - Output Supply:
- 6.5V ~ 24V
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
- Approval Agency:
- CQC, CSA, UL, VDE
SI8237AB-AS1R FAQ
1.How can I place an order for SI8237AB-AS1R through Aetrix?
Please submit a Request for Quotation (RFQ) for SI8237AB-AS1R on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SI8237AB-AS1R reliable?
The price and inventory of SI8237AB-AS1R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SI8237AB-AS1R is usually 5 days.
3.What payment methods are accepted for SI8237AB-AS1R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SI8237AB-AS1R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SI8237AB-AS1R?
SI8237AB-AS1R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SI8237AB-AS1R order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SI8237AB-AS1R?
For technical support, including SI8237AB-AS1R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SI8237AB-AS1R requirements.
6.How does Aetrix verify that SI8237AB-AS1R is sourced from the original manufacturer or authorized distributors?
All SI8237AB-AS1R products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SI8237AB-AS1R meets industry standards.
7.What is the process for return or replacement of SI8237AB-AS1R?
All SI8237AB-AS1R units undergo pre-shipment inspection (PSI). If there is an issue with SI8237AB-AS1R, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SI8237AB-AS1R part is unused and in its original packaging.
Return procedure for SI8237AB-AS1R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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